🛡️ GHSA-848f-mph5-9pm9 — zendframework1

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-331 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Zendframework Potential Information Disclosure and Insufficient Entropy vulnerability

In Zend Framework, Zend_Captcha_Word (v1) and Zend\Captcha\Word (v2) generate a "word" for a CAPTCHA challenge by selecting a sequence of random letters from a character set. Prior to this advisory, the selection was performed using PHP's internal array_rand() function. This function does not generate sufficient entropy due to its usage of rand() instead of more cryptographically secure methods such as openssl_pseudo_random_bytes(). This could potentially lead to information disclosure should an attacker be able to brute force the random number generation.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

GHSA-848f-mph5-9pm9 is classified as CWE-331: Insufficient Entropy. A generator is seeded with too little randomness, narrowing the range of outputs an attacker must search.

Affected software

GHSA-848f-mph5-9pm9 is recorded against 1 package.

  • zendframework/zendframework1 (from 1.12.0 up to 1.12.17)

Timeline and source

Published on 7 June 2024 and last revised on 4 December 2024. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

framework.zend.com (Web)
github.com (Web)
github.com (Package)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-331
Public Exploit ✅ No
Source OSV
Published 2024-06-07
Updated 2026-08-12
Modified 2024-12-04
Fix URL N/A

Affected Packages

Software From version Fixed in
zendframework/zendframework1 1.12.0 1.12.17

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